Thermostatic valve



March 19, 1929. N. J. QUINN THERMOSTATIC VALVE Filed Jan. 18, 1928 'INVENTOR. Nelson :[Quz'mz k v g ATTORNEYS Patented Mar. 19,1929.

NELSON J. Qrrnvrr, or uronnpo, OHIO.

THERMosrATIo ALVE.

Application filed January 18, 1928. Serial No. 247,538.

The present invention relates, as indicated, to a thermostatic valve, and the primary object thereof is' to provide a valve of the type indicated which will be quite sensitive to temperature changes, which will be small, simple, and compact, and which may be used to advantage in the cooling systems of internal combustion engines.

In cold weather, the circulation of the cooling medium through the water jacket of an internal combustion engine is deleterious rather than beneficial during approximately the first few minutes of. operation. The engine is not broughts to a proper operating temperature because" of the flow of cold liquid-about the cylinders, and the consequence is that a large volume of raw liquid gasoline is deposited in the cylinders there to thin the lubricating oil, deter combustion,

and cause undue friction between the moving parts in the cylinders. Various devices for preventing such circulation of cooling medium have been suggested before, and I am thermostatically operated valve in a cooling syste nis not broadly new. All of the devices 'of this general type which are known to me are, however, quite .complicated. It is my purpose to provide a" device of' this type of great simplicity. Furthermore, a-

great number of these devices are responsive not only to temperature changes, but also to pressure changes, and are consequently somewhat dangerous, To the accomplishment of the foregoing and related ends, said invention, then, consists of. the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mcclr anism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention maybe used.

Fig. 1 is a diagrammatic representation of a portion of the cooling system ofan internal combustion engine showing my valve installed therein; Fig. 2 is a transverse vertical section of one form of my valve upon an enlarged scale, the valve being shown closed; Fig. 3.is a similar view, the valve being shown in open position;.Fig. 4 isa sectional view of a modified form of valve; Fig. 5 is a plan view of the modification shown in Fig. 4; and Fig. 6 is a still further modification.

' as at 23 to a staple 24 secured Referring more particularly to the drawing's, the reference numeral 1 indicates an automobile radiator having an inlet connection 2; while 3 represents a cylinder block having an outlet connection 4. The connections 2 and 4 are joined normally by a short length of rubber hose 5. According to my invention, I insert within this hose 5 a metallic tube 6 within which is mounted a thermostatically operated valve 7. Of course, it is to be understood that this tube 6 may as well be mounted in one of the metallic connections as 2 or. 4, or in a chamber especially built for it by the manufacturer. However, the fact that the tubing 6 may be inserted within the usual hose connection of an automobile without the use of tools of any sort, is a decided advantage, in that the device may be easily installed in cars already on the market, and may be easily removed for inspection or repair.

The valve 7 is preferably formed of thermostatic material; i. e., said valve is'bimetallic in construction. Such valve is pivotally mounted as at 8, and an arm 9 is secured to one end of the valve while an arm 10 is secured to the opposite end thereof. While I have illustrated a butterfly type of valve, it is to be understood that I do not intend to limit myself to this particulartype of valve. A third arm 11 is secured to the valve 7 at a point between its ends.

The arm 9 carries a pivot 12 which ex. tends through a slot 13 in one arm 14 of a bell crank lever. The arm 10 carries a pivot 15 which passes through said arm 14 adjacent the angle of the lever, The other arm 16 of'said lever is pivoted as at 17 to one end 18 of a lever pivoted at 19- to the free end of the arm 11. The opposite end 20 of said lever is pivoted as at 21 to one end of a link 22, the opposite end of which is pivoted in the wall of the tubular member 6.

It will be seen that, as the ends of the valve 7 curl upwardly in response to a rise in temperature, the arms 9 and 10 will cause a clockwise rotation of the bell crank lever which will cause a straightening of the toggle formed bythe link 22 and the lever 18-20, thus forcing the valve to rotate in a clockwise direction about its axis 8.

The modification disclosed in Figs. 4 and 5 is similar to that disclosed in Figs. 2 and 3, but the valve proper 7 is not bi-metallic in character, but carries a longitudinally extending bi-metallic strip secured to said valve 7 by means of a bolt 26, and separated therefrom by a washer 27. Arms 9 and l0. are carried by the'strip 25 and are adapted to be secured to members of any form of linkage'which will cause the desired actuation of the valve. r

Fig. 6 discloses a bi-metallic valve 7" 'formed with a transversely extending constrip 25.

Other modes ofapplying the principle of I my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. A valve comprising a housing, a bimetal valve member in said housing and means connected to said valve member to cause thermostatic fiexure of said valve member to impart opening and closing movement to said valve member.

2. In a valve, a housing, a bi-metal valve member, and means connected to said valve member and to said houslng for causing thermostatic fiexure of said valve member to impart opening and closing movement to said valve member. I

3. A valve comprising a housing, a bimetal butterfly valve member pivoted in said housing, and means connected to said valve member 'to convert thermostatic flexure of said valve member into rotary movement of said valve member about its pivot.

4:. A valve comprising a housing, a bimetal butterfly valve member pivoted in said housing, and means connected to said valve member to convert thermostatic flexure of said valve member into rotary movement of said valve member about its pivot, said valve member being formed with a concave-convex bead transversely thereof.

5. A valve comprising a housing, a butterfly valve pivoted in said housing, and a linkage connected to said valve member and to said housing and adapted to convert curling of said valve member on a transverse axis to rotation of said valve member about its pivot.

Signed by-me this 11th day of January, 1928.

NELSON J. QUINN, 

